25512465220 has 72 divisors (see below), whose sum is σ = 60920357400. Its totient is φ = 8957329920.

The previous prime is 25512465193. The next prime is 25512465229. The reversal of 25512465220 is 2256421552.

It can be written as a sum of positive squares in 4 ways, for example, as 1065891904 + 24446573316 = 32648^2 + 156354^2 .

It is not an unprimeable number, because it can be changed into a prime (25512465229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111585 + ... + 251944.

It is an arithmetic number, because the mean of its divisors is an integer number (846116075).

Almost surely, 2^25512465220 is an apocalyptic number.

25512465220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25512465220 is an abundant number, since it is smaller than the sum of its proper divisors (35407892180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25512465220 is a wasteful number, since it uses less digits than its factorization.

25512465220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363589 (or 363576 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 25512465220 its reverse (2256421552), we get a palindrome (27768886772).

The spelling of 25512465220 in words is "twenty-five billion, five hundred twelve million, four hundred sixty-five thousand, two hundred twenty".